2 * SPU file system -- system call stubs
4 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
6 * Author: Arnd Bergmann <arndb@de.ibm.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include <linux/file.h>
23 #include <linux/module.h>
24 #include <linux/syscalls.h>
28 struct spufs_calls spufs_calls = {
32 /* These stub syscalls are needed to have the actual implementation
33 * within a loadable module. When spufs is built into the kernel,
34 * this file is not used and the syscalls directly enter the fs code */
36 asmlinkage long sys_spu_create(const char __user *name,
37 unsigned int flags, mode_t mode, int neighbor_fd)
40 struct module *owner = spufs_calls.owner;
41 struct file *neighbor;
45 if (owner && try_module_get(owner)) {
46 if (flags & SPU_CREATE_AFFINITY_SPU) {
47 neighbor = fget_light(neighbor_fd, &fput_needed);
50 ret = spufs_calls.create_thread(name, flags,
52 fput_light(neighbor, fput_needed);
56 ret = spufs_calls.create_thread(name, flags,
64 asmlinkage long sys_spu_run(int fd, __u32 __user *unpc, __u32 __user *ustatus)
69 struct module *owner = spufs_calls.owner;
72 if (owner && try_module_get(owner)) {
74 filp = fget_light(fd, &fput_needed);
76 ret = spufs_calls.spu_run(filp, unpc, ustatus);
77 fput_light(filp, fput_needed);
84 int register_spu_syscalls(struct spufs_calls *calls)
86 if (spufs_calls.owner)
89 spufs_calls.create_thread = calls->create_thread;
90 spufs_calls.spu_run = calls->spu_run;
92 spufs_calls.owner = calls->owner;
95 EXPORT_SYMBOL_GPL(register_spu_syscalls);
97 void unregister_spu_syscalls(struct spufs_calls *calls)
99 BUG_ON(spufs_calls.owner != calls->owner);
100 spufs_calls.owner = NULL;
102 EXPORT_SYMBOL_GPL(unregister_spu_syscalls);